I recently was asked to take a look at one of my customers sprinkler's systems she is currently running a rainbird control panel and when maually testing the zones The control panel fried. I plan on replacing the control board, I looked at the schematics and found this to be a 13 zone system and noticed that some of the heads need to be replaced. due to a fire spreading over those zones. Is there anything I should be aware of before undergoing this project. Or should I hand this one off to someone else.